VXDIAG VCX Pro License Invalid or Expired Solution

I have VXDIAG VCX Pro with full authorization and when I want to update it, it gives me this error “The device license for this application is invalid or expired!” . What to do next, please go on reading.

Working solution for sharing:

I had to update vx manager to the latest version and then reboot. Only after that did the license update. vx manager shows as version 1.8.4.0315. I had to download the latest version off the website (http://vxdiag.net/ ) instead of clicking the update button, otherwise your vxmanager still shows as version 1.8.1.